Self-lubricating bolt.



UNITED sTATEs PATENT OFFICE.

OSCAR ZERK, F CLEVELAND, OHIO, ASSIGNOR, BiY MESNE ASSIGNMENTS, TO GEORGE W. BOWEN, OF AUBURN, NEW YORK.

SELF-LUBRICATING BOLT.

To all whom yz't may concern.'

Be it known that. I, OscAR Zaun, ,ai subject vof the Emperor of Austria-IIungary, residfeed the oil to'the bearing surface as needed,

and which shall be easily accessible for rellli'ng and at the same time have a very neat appearance. A more specific object is to so construct the parts that they may be cheaply manufactured. Another object is to provide an efficient device for supporting the wick which feeds the oil to the bearingsurfaces.

These, and other objectswill become apparent-.in the description of the embodiment shown in the drawing hereof.

In the drawing, Figure 1 is a vertical axial section through my spring bolt, in place in the eye of a spring betvieentwo shackle ears or plates. on the line 2-2 of Fig. 1. Fig. Bis theside elevation of the spring bolt removed. Fig. 4 is a right hand end elevation of the bolt and nut. Fig. 5 is the transverse section taken pn the line 5-'-5 of Fig. 1.

Referrin to the parts by numerals, 1 indicates thefly'eaf of air automobile spring, and 2 the curled Vend thereof Amaking an eye for receiving the bolt. In this'feye is snugly fitted a bearing sleeve 3,- between two shackle,plates 4 and 5. These two'V shackle plates may be the two armsof 'a single shackle, ,or may be ears o f another spring member, as is well understood.

8 indicates the bolt which occupies the alined openings in the two shackle membersi and the in ermediate sleeve 3. At one end of the' bo'lt'is an angular or. hexagon heed 9.

yintegral therewith, while 4the othe is threaded' at 10 lto receive the nut which is s 9wn as a hexagonnut. This construetion pivotally connects the Vleaf sprin" 1 with the shackle members, as will bewel i understood. The bolt 8 is of compratively large diameter to provide a large aring surface and has an internal bore 12 extending from Specification of Letters Patent.`

Fig. 21 is a sectional view taken Patented Feb. 27, 1917.

Application led May 27, 1913. Serial No. 770,160.

the end of the head 9, to the wall 13, in the b5 threaded end. i

' Extending through the wall of the bolt are one o'r more radial holes 14. Occupying these holes and extending across' the bore 12 are wicks or porous plugs 1'5, preferably of 60 felt, althou h any suitable porous material may be use These wicks are contained in perforated tubes, 16 occupying the radial holes 14, extendingy across the bore and hav-v ing their inner ertls seating in suitable depressions 17 registering with the holes 14. hese ,tubes may be erforated, as Shown in Fig. 1, or if desire may be made of wire net.

Theouter ends of the Vwicks V15 press 70 against the bearing sleeveA and serve to carry the oil thereto as needed by capillary attraction. To properly distribute the oil shallow peripheral grooves 17 are 'provided around the bore, in communication with the tribute the oil throughout the length of the sleeve-3 Without carrying it to the other.

portions of the structure, which it is not necessary to lubricate.

To kee tll'ese radial holes at the top so that the il will not leak out provide-on the shackjie plate 4 a suitable boss 2() engaging oneof the flat sides of the head Sl to prevent the bolt turning.

In the open end of the bore l2 is fitted a shank or reduced end portion 214 of an oil cup or hollowV plug`22. The shank 21 is somewhat smaller in diameter than the cup portion, and forms a shoulder which abuts Vthe head 9 of the bolt. Around the head 22 is formed a sliallow'peripheral groove 23. 95

A suitable openin 2 4 is made through the cylindrical wall 0% the head 22 and in the groove 23 throu h which the oil cup and bore 12 may .be lled with the oil. In this groove 23 is a thin spring 25 which extends 1001 around the head somewhat more than onehalfof the circumference. In a portionof the sprin is a small depression 26, which engages e oil hole 24 and prevents the sprin from moving around the head. Thefrhlo.

action of the spring 25 keeps the .A

hugging spring 1n position'inthe groove and prevents the depression 26 moving inadveroil reservoir.

very simple dust proof cover for the 011 and tent-ly out of engagement with the oil hole 24. The. ends of the spring 25 are bent outwa rdly as :1t-27, thus forming projections by which the spring may be slid around the groove by hand when it is desired to fill the This construction' provides a hole.

The construction of the oil cup is such that it may' be pressed from a single piece of sheet metal into the shape shown, and then forced int'o position in the bore from which it is not necessary to remove it throughout the life of the bolt.

I provide simple locking means for the Vnut 1l, which vconsists of a washer 30'surrounding the threaded portion 10 of the bore, and4 having the small engaging-a longitudinal,groove in the bolt. This washer has preferably an angular or hexagonal exterior, substantially the saine size as the nut 10, and from the middle portion of eachA edge extend ears 33.

while the parts are .being assembled, but when in use are bent over onto vthe flat sides of the nut to hold it against rotation.

It will be seen from the foregoing description that l have provided astrong and siniple self-lubricating sprn bolt, which, when ,in use, requires practiea'llgy no attention, for the lubricant -is only taken lfrom' the reservoir as needed., and will last'a very long' time. lts bear-ing surfaces are large and thel oil is distributed -to not beyond them. 'Ihe-neatness--of appearance is also aI feature of the bolt. there being only a-verysn'ia-ll coinpactlhead on the oil cup frolnwhiehthebore is filled.

Having thus described my'invention, what claim is:

1. A self-lubricating bolt ,comprising a one piece body portion having a lengthwise pa ssage opening through one en d 'of the bolt a lateral passage leading from lthe lengthwise passage through Z .the periphery ofthe b0dy,and -a hollow "p1-ug extending' projection 31' These" ears lie idly in the plane of the washer,

the points neededfbut 'a into the lengthwise passage at its open end, and having a filling opening, substamially as and for the purpose set forth..

2, A selflubricating bolt comprising a one piece body portion having an opening through. the head of the bolt, a hollow plug occupying said opening and having a lling opening exterior to the bolt body, and a closure for the filling opening carried by said hollow plug on the periphery thereof.

3 In a device of the character described, the con'ibination of a bolt body having a bore extending into one end, a hollow plug hav- .ing a reduced portion snugly occupyin the bore, a head portion beyond the head o the bolt, an annular groove in said head portion, a. filling openlng through it, and a closing spring occupying 'the groove and adapted to cover the opening.

4. In a self-lubricating bolt, the combination of a body having a head at oneend and having a. central bore extending through such head, a hollow plug snugly occupying the bore adjacent to the head and bearing .against the outer edge of the head,.a filling opening into said pl'ug exterior to the head, a closure for said'opening, lateral opening from the bore to the bearing surface of the bolt, a tube in said lateral yopening extendsagewa-ys' 'through' it, .and

a fibrous material within the' tube.

bilia-tion'of a. body having a head atoneend, head, a hollowplug fitting in 1the bore-,and abutting against the end of the head and having a filling opening extending through the periphery thereof and a closure for said openlng.

In testimony whereof, I hereunto affix my slgnature 1n the presence of two witnesses. A

oseAR ZERK.- f Witnesses: `Binarzivaiv B. WEST,

GERrRUnE K. SMITH.

nd" a 'ntral 'bore extending through the. 

